1
<?xml version="1.0" encoding="ISO-8859-1" standalone="no"?>
2
<!DOCTYPE MAN SYSTEM "../../manrev.dtd">
4
<LANGUAGE>eng</LANGUAGE>
6
<TYPE>Scilab Function</TYPE>
7
<DATE>April 1993</DATE>
8
<SHORT_DESCRIPTION name="lotest"> demo of the Lorenz attractor</SHORT_DESCRIPTION>
10
<CALLING_SEQUENCE_ITEM>[]=lotest([f_l,odem,xdim,npts,pinit]) </CALLING_SEQUENCE_ITEM>
11
<CALLING_SEQUENCE_ITEM>[y]=lorenz(t,x) </CALLING_SEQUENCE_ITEM>
12
<CALLING_SEQUENCE_ITEM>[]=ilo(sig,ro,beta) </CALLING_SEQUENCE_ITEM>
13
<CALLING_SEQUENCE_ITEM>[]=ilof(sig,ro,beta) </CALLING_SEQUENCE_ITEM>
18
<PARAM_NAME>f_l</PARAM_NAME>
20
<SP>: can be <VERB>"loren"</VERB> or <VERB>lorenz</VERB>. it
21
is the name of the external for the Lorenz
22
system. <VERB>"loren"</VERB> will use a Fortran coded
23
version of the lorenz system and arnold will and <VERB>loren</VERB>
24
will use a Scilab coded version.<VERB>lorentz</VERB> is the Scilab
25
macro which code the lorenz system. This macro is loaded when
26
calling <VERB>lotest</VERB>.</SP>
30
<PARAM_NAME>ilof, ilo</PARAM_NAME>
32
<SP>:are used to fix the parameters of the Fortran and Scilab code version of the Lorenz system.</SP>
36
<PARAM_NAME>odem,xdim,npts</PARAM_NAME>
38
<SP>: are optional arguments. Their meaning and syntax can be found in the portr3d help</SP>
45
A call to the function <VERB>lotest()</VERB> will interactively
46
display a phase portrait of a the following dynamical system</P>
50
y(2)=ro*x(1) -x(2)-x(1)*x(3);
51
y(3)=-beta*x(3)+x(1)*x(2);
63
<LINK>chaintest</LINK>